Waldron j



guitar gm... 35mm @ffm.

WALDRON J. CHEYNEY, 0F. WALLINGFORD, PENNSYLVANIA.

' Letters Patent No. 64,196, dated April 30, 1867; antedatcd lllarck 29,1867.

IMPROVEMENT IN THE MANUFAOTURE OF PORCELAIN.

digs fitlgebult referrer: in in time Etctters 33mm mm matting put at1112 time.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, WALDRON J.OHEYNEY, of Wallingford, Delauare county,State of Pennsylvania, have invented a new and useful Improvement in theManufacture of Cast Porcelain; and I do hereby declare the following tobe a full and exact description of the same.

I take of either of the minerals known as eryolite, chiolite, andfluellite, (they being, respectively, fiuorids of sodium and aluminium,and a fluorid of alu'minium,) and mix it thoroughly with sand. or withsand, soda, potash, lime, or other alkali or oxide, in such combinationsand in such proportions as may be necessary to produce the materialdesired, ranging in itsquality from egg-shell china to statuaryporcelain, (including Parian, Carrara, and other similar productions.)For soft porcelain the sodais to be increased. For hard porcelain potashis to be added. For Parian or Carrara add lime.

I have found the following-named combination and proportions to answerwell: Sand, 10 parts; cryolite, 3 parts; soda, 3 part-s; lime, 3 parts:10 3+3-l- 3:19 parts. In case chiolite should be used the soda is to beincreased to 4 parts. Should fiuellite be used the soda is to beincreased to 9 parts, as the last-named mineral is deficient in thesodium which 'is found in the other two. The materials, after beingintimately mixed, are introduced into a glass furnace, the pot usedbeing similar to an ordinary glass pot, with the exception of having asecond hoodat the bottom for the purpose of discharging the flux edmetal. When completely fused the metal is run into proper moulds, simplycast, or, if necessary, pressed. If desired, the metal can be blown inordinary glass moulds. 7

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. The use of the minerals known ascryolite and chiolitc, or theirequivalents, in combination with silica, for the purposeof producing avitreous porcelain, substantially as described.

2. The fusing .of either of the before-named minerals, or fluellite, ortheir equivalents, with silica, in combination with soda, potash, lime,or other alkali or oxide, substantially as described.

3. A new article of manufacture, madeihy fusing silica with theabove-named minerals, or their equivalents, which I call hot-castporcelain."

WALDRON J. CHEYNEY.

Witnesses: v

V J. E. SHAW,

GEO. E. BUCKLEY.

